/*
Copyright 2025 linux.do
Modified by Arctel.net, 2026

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package scheduler

import (
	"fmt"
	"sync"
	"time"

	"github.com/Rain-kl/Wavelet/internal/config"
	"github.com/Rain-kl/Wavelet/internal/task"

	"github.com/hibiken/asynq"
)

var (
	scheduler     *asynq.Scheduler
	schedulerOnce sync.Once
)

func init() {
	// AsynqClient 已在 task 包中初始化
}

// GetAsynqClient 获取全局 AsynqClient
func GetAsynqClient() *asynq.Client {
	return task.AsynqClient
}

// StartScheduler 启动调度器
func StartScheduler() error {
	var err error
	schedulerOnce.Do(func() {
		location, locErr := time.LoadLocation("Asia/Shanghai")
		if locErr != nil {
			err = fmt.Errorf(errLoadLocationFailed, locErr)
			return
		}
		scheduler = asynq.NewScheduler(
			task.RedisOpt,
			&asynq.SchedulerOpts{
				Location: location,
			},
		)

		// 清理未使用的上传文件任务
		if _, err = scheduler.Register(
			config.Config.Scheduler.CleanupUnusedUploadsTaskCron,
			asynq.NewTask(task.CleanupUnusedUploadsTask, nil),
			asynq.Unique(23*time.Hour),
			asynq.MaxRetry(3),
		); err != nil {
			return
		}

		// 启动调度器
		err = scheduler.Run()
	})
	return err
}